Maybe your network administrator has locked down your pc? where as you cannot make any changes .
or maybe you need to update win media to the latest version

Hi the pc it's not locked: I'm inside a domain but my user has admin permissions. If I logon on a different pc (same hardware and OS with SAME Windows Media Player version) with my credentials the CLIP+ is correctly detected. Sometimes (10%-15%) the CLIP+ is correctly detected.

I'll try to update WMP tomorrow... luckily I finished working for today